Mathematician-Apologist Leonhard Euler

Church History Timeline

Voltaire and Frederick the Great mocked him; Catherine the Great of
Russia employed him; Mathematicians revere him. His name was Leonhard
Euler. The son of a Protestant minister, Euler was born on this day, April 15, 1707, in Basel,
Switzerland.

Euler showed early promise in math, a promise that was amply
fulfilled. Gathered together, his works fill sixty encyclopedia-size
volumes! He was a founder of analysis and made major advances in
arithmetic, geometry, trigonometry and calculus. His symbols are used to
this day. The Euler constant, Euler numbers, Eulerian integrals and
other mathematical forms are named for him.

Euler almost didn't make it into math. His father wanted him to be a
minister. But Euler knew what he was best at and pleaded to be allowed
to switch courses. His father finally agreed. Euler remained a staunch
Calvinist all his life.

Catherine I invited the young man to Russia. She promised him a
teaching job at the Academy of Sciences in St. Petersburg. But she died
before the job was given to him and Euler's circumstances forced him to
consider taking a position in the Russian navy. Fortunately the Academy
came through and Euler's brilliance was not lost at sea. He married and
had a family. Friends were astonished at the way he could produce
high-caliber work with squirming children on his lap and shoulders.

Frederick the Great invited the now-renowned mathematician to
Prussia. But Frederick and Voltaire, both of whom hated Christianity,
mocked Euler for his "simple" beliefs. In spite of their nastiness,
Euler published Letters to a German Princess, a book combining
science and faith and written for his pupil, Frederick's niece.
Translated into seven languages, it was widely read throughout Europe.
Despite the luster that Euler lent to the Berlin Academy, Frederick
turned against him. Euler returned to Russia.

Disasters now stalked him. His house burned. Fortunately his papers
were saved. His wife died. He had lost sight in one eye solving a
problem in three days which most mathematicians expected to take a
month. Now a cataract formed on his other eye. Surgery restored his
sight, but both eyes became infected and he was in such excruciating
pain that he said only his faith in God enabled him to bear it. When the
infection cleared, he was totally blind.

Then, in one of the greatest achievements of all time, he solved some
of the most difficult problems of all mathematics on the blackboard of
his mind, dictating the solutions to friends. Euler remains one of the
greatest geniuses mathematics has ever known.